railway RRB Technician Grade 1 Mock Test 2024 Physics Electromagnetic Induction and Inductance Self-Induction
A varying current in a coil changes from 10 A to zero in 1.5 sec. If the average emf induced in the coil is 200 V, the self inductance of the coil is
1
25 H
2
30 H
3
50 H
4
45 H